HomeScience Discipline Petrophysics and Well Logs

Petrophysics and Well Logs

Explorer Article

'More of the same” is the gist of the annual AAPG salary survey, which is to say, with a couple of notable exceptions, there have been few changes in salaries since last year’s survey, owing to the ongoing downturn in the industry. But, there might be signs – however faint – that the job market is on the verge of some important, long-term changes.

American Association of Petroleum Geologists (AAPG)
Learn! Blog

“No Money Down Revitalization” is a great deal. First, the operator who is really hurting in this low price environment does not have to put up any initial capital. Second, the service provider is able to charge a slightly higher price to account for the financing and the additional guidance. Finally, geologists and engineers are able to be paid for locating candidates, developing workflows, and overseeing the match-making out of the increase production.

Show more
American Association of Petroleum Geologists (AAPG)
Learn! Blog

The 'New Thinking and Value Propositions in Exploration and Production: ProActive Steps Now' GTW Workshop was an excellent opportunity to knowledge share in a time of low price environments every where.

American Association of Petroleum Geologists (AAPG)
Learn! Blog

The goal of this two-day workshop is to proactively create opportunities yourself and your company in a low price environment. You will learn how to bring value propositions to operators. Revitalize reservoirs for less than the cost of plugging and abandoning, paid for by increased production. Rethink reservoirs and push paradigm shifts that will result in breakthroughs.  We will discuss how to use these times to pilot new products and technologies and thus position innovative companies to boom when conditions improve. This event is for engineers, geologists, geophysicists, land professionals, and entrepreneurs. *Please see our discounted rates for unemployed geoscientists, students and young professionals

Show more
American Association of Petroleum Geologists (AAPG)
Learn! Blog

Understanding fractures and fracture networks is absolutely vital for determining the best places to drill and for pinpointing sweet spots. Fracture characterization is also important for optimizing completion and production, both in vertical and horizontal wells. In mudrocks and shale plays, understanding fractures as well as the geomechanical properties is an important part of the well design. Welcome to an interview with Stephen Sturm, whose work with fractures and fractured reservoirs spans many of the world's shale plays.

Show more
American Association of Petroleum Geologists (AAPG)
Learn! Blog

While EOR has played an important role in U.S. onshore production, during times of extended low prices, it becomes more important than ever because, if planned well, the costs per barrel recovered can be quite low. Of the recent EOR methods, carbon dioxide floods have had some of the most dramatic results. Welcome to an interview with Jesse Garnett White and Mike Raines, whose focus has been on determining the best ways to recover some of the previously unrecoverable oil and gas from mature fields. ********** Stay tuned! Find out more about the AAPG Technical Interest Group on CO2 and EOR. AAPG will have a new series, Making Money with Mature Fields, which will include valuable information and opportunities to present papers, obtain training (with certificates), and network. Please join the LinkedIn group, Build Your Own Business Opportunities. Questions?  Contact Susan Nash ([email protected]). 

Show more
American Association of Petroleum Geologists (AAPG)
Learn! Blog

Welcome to an interview with Bryan Turner, whose work at the University of Oklahoma's Institute of Reservoir Characterization focuses on chemostratigraphy. 

American Association of Petroleum Geologists (AAPG)
Learn! Blog

The unprecedented downturn is creating unprecedented opportunities, especially in mature fields. Join us in Houston to learn how new techniques and technologies are increasing production in old wells, and are turning boring old fields into exciting, new, revitalized sources of new revenue and recoverable reserves. Sign up today for AAPG's GTW in Houston, May 17-18, New Thinking and Value Propositions. Check out the huge discounts for laid-off workers, young professionals, and students. Prepare yourself for huge success now! For more information, please read the entire post, which includes the full schedule. 

Show more
American Association of Petroleum Geologists (AAPG)
Explorer Policy Watch

At AAPG’s 2016 Congressional Visits Days on March 15 and 16, AAPG members participated in 27 meetings with members of Congress and executive branch agencies that research or regulate oil and natural gas activities.

American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

When Occidental Petroleum Corporation was reorganized in 1959, its total oil production was some 100 barrels per day. By the time Moammar Gaddaffi nationalized the industry in 1969, Oxy Libya, the wholly owned subsidiary, was producing 800,000 barrels per day. Such an amount made Oxy Libya the eighth largest producer in the world.

American Association of Petroleum Geologists (AAPG)
Workshop
Khobar, Saudi Arabia
Monday, 8 May Wednesday, 10 May 2023, 8:00 a.m.–5:00 p.m.

“Wait! There is a short cut. Turn right from here”. That’s probably the sound of an electric current bypassing the resistive hydrocarbons, in a maze or network of porous media, when traveling from transmitter to receiver. This workshop will serve the participants need with the up to date advancements in describing and characterizing low resistivity and low contrast pay, and eventually, maximize resources.

American Association of Petroleum Geologists (AAPG)
VG Abstract

The Betic hinterland, in the westernmost Mediterranean, constitutes a unique example of a stack of metamorphic units. Using a three-dimensional model for the crustal structure of the Betics-Rif area this talk will address the role of crustal flow simultaneously to upper-crustal low-angle faulting in the origin and evolution of the topography.

Request a visit from Juan I. Soto!

American Association of Petroleum Geologists (AAPG)
VG Abstract

The carbonate sequences that were deposited in the now exhumed Tethyan Ocean influence many aspects of our lives today, either by supplying the energy that warms our homes and the fuel that powers our cars or providing the stunning landscapes for both winter and summer vacations. They also represent some of the most intensely studied rock formations in the world and have provided geoscientists with a fascinating insight into the turbulent nature of 250 Million years of Earth’s history. By combining studies from the full range of geoscience disciplines this presentation will trace the development of these carbonate sequences from their initial formation on the margins of large ancient continental masses to their present day locations in and around the Greater Mediterranean and Near East region. The first order control on growth patterns and carbonate platform development by the regional plate-tectonic setting, underlying basin architecture and fluctuations in sea level will be illustrated. The organisms that contribute to sequence development will be revealed to be treasure troves of forensic information. Finally, these rock sequences will be shown to contain all the ingredients necessary to form and retain hydrocarbons and the manner in which major post-depositional tectonic events led to the formation of some of the largest hydrocarbon accumulations in the world will be demonstrated.

Show more

Request a visit from Keith Gerdes!

American Association of Petroleum Geologists (AAPG)
DL Abstract

Local sea-level changes are not simply a function of global ocean volumes but also the interactions between the solid Earth, the Earth’s gravitational field and the loading and unloading of ice sheets. Contrasting behaviors between Antarctica and Scotland highlight how important the geologic structure beneath the former ice sheets is in determining the interactions between ice sheets and relative sea levels.

Request a visit from Alex Simms!

American Association of Petroleum Geologists (AAPG)
DL Abstract

President Biden has laid out a bold and ambitious goal of achieving net-zero carbon emissions in the United States by 2050.  The pathway to that target includes cutting total greenhouse gas emissions in half by 2030 and eliminating them entirely from the nation’s electricity sector by 2035. The Office of Fossil Energy and Carbon Management will play an important role in the transition to net-zero carbon emissions by reducing the environmental impacts of fossil energy production and use – and helping decarbonize other hard-to abate sectors.

Show more

Request a visit from Jennifer Wilcox!

American Association of Petroleum Geologists (AAPG)
DL Abstract

Around 170 million years ago, the Gulf of Mexico basin flooded catastrophically, and the pre-existing landscape, which had been a very rugged, arid, semi-desert world, was drowned beneath an inland sea of salt water. The drowned landscape was then buried under kilometers of salt, perfectly preserving the older topography. Now, with high-quality 3D seismic data, the salt appears as a transparent layer, and the details of the drowned world can be seen in exquisite detail, providing a unique snapshot of the world on the eve of the flooding event. We can map out hills and valleys, and a system of river gullies and a large, meandering river system. These rivers in turn fed into a deep central lake, whose surface was about 750m below global sea level. This new knowledge also reveals how the Louann Salt was deposited. In contrast to published models, the salt was deposited in a deep water, hypersaline sea. We can estimate the rate of deposition, and it was very fast; we believe that the entire thickness of several kilometers of salt was laid down in a few tens of thousands of years, making it possibly the fastest sustained deposition seen so far in the geological record.

Show more

Request a visit from Frank Peel!

American Association of Petroleum Geologists (AAPG)
VG Abstract

Production from unconventional petroleum reservoirs includes petroleum from shale, coal, tight-sand and oil-sand. These reservoirs contain enormous quantities of oil and natural gas but pose a technology challenge to both geoscientists and engineers to produce economically on a commercial scale. These reservoirs store large volumes and are widely distributed at different stratigraphic levels and basin types, offering long-term potential for energy supply. Most of these reservoirs are low permeability and porosity that need enhancement with hydraulic fracture stimulation to maximize fluid drainage. Production from these reservoirs is increasing with continued advancement in geological characterization techniques and technology for well drilling, logging, and completion with drainage enhancement. Currently, Australia, Argentina, Canada, Egypt, USA, and Venezuela are producing natural gas from low permeability reservoirs: tight-sand, shale, and coal (CBM). Canada, Russia, USA, and Venezuela are producing heavy oil from oilsand. USA is leading the development of techniques for exploring, and technology for exploiting unconventional gas resources, which can help to develop potential gas-bearing shales of Thailand. The main focus is on source-reservoir-seal shale petroleum plays. In these tight rocks petroleum resides in the micro-pores as well as adsorbed on and in the organics. Shale has very low matrix permeability (nano-darcies) and has highly layered formations with differences in vertical and horizontal properties, vertically non-homogeneous and horizontally anisotropic with complicate natural fractures. Understanding the rocks is critical in selecting fluid drainage enhancement mechanisms; rock properties such as where shale is clay or silica rich, clay types and maturation , kerogen type and maturation, permeability, porosity, and saturation. Most of these plays require horizontal development with large numbers of wells that require an understanding of formation structure, setting and reservoir character and its lateral extension. The quality of shale-gas resources depend on thickness of net pay (>100 m), adequate porosity (>2%), high reservoir pressure (ideally overpressure), high thermal maturity (>1.5% Ro), high organic richness (>2% TOC), low in clay (<50%), high in brittle minerals (quartz, carbonates, feldspars), and favourable in-situ stress. During the past decade, unconventional shale and tight-sand gas plays have become an important supply of natural gas in the US, and now in shale oil as well. As a consequence, interest to assess and explore these plays is rapidly spreading worldwide. The high production potential of shale petroleum resources has contributed to a comparably favourable outlook for increased future petroleum supplies globally. Application of 2D and 3D seismic for defining reservoirs and micro seismic for monitoring fracturing, measuring rock properties downhole (borehole imaging) and in laboratory (mineralogy, porosity, permeability), horizontal drilling (downhole GPS), and hydraulic fracture stimulation (cross-linked gel, slick-water, nitrogen or nitrogen foam) is key in improving production from these huge resources with low productivity factors.

Show more

Request a visit from Ameed Ghori!

American Association of Petroleum Geologists (AAPG)
VG Abstract

In comparison with the known boundary conditions that promote salt deformation and flow in sedimentary basins, the processes involved with the mobilization of clay-rich detrital sediments are far less well established. This talk will use seismic examples in different tectonic settings to document the variety of shale geometries that can be formed under brittle and ductile deformations.

Request a visit from Juan I. Soto!

American Association of Petroleum Geologists (AAPG)
DL Abstract

As oil and gas exploration and production occur in deeper basins and more complex geologic settings, accurate characterization and modeling of reservoirs to improve estimated ultimate recovery (EUR) prediction, optimize well placement and maximize recovery become paramount. Existing technologies for reservoir characterization and modeling have proven inadequate for delivering detailed 3D predictions of reservoir architecture, connectivity and rock quality at scales that impact subsurface flow patterns and reservoir performance. Because of the gap between the geophysical and geologic data available (seismic, well logs, cores) and the data needed to model rock heterogeneities at the reservoir scale, constraints from external analog systems are needed. Existing stratigraphic concepts and deposition models are mostly empirical and seldom provide quantitative constraints on fine-scale reservoir heterogeneity. Current reservoir modeling tools are challenged to accurately replicate complex, nonstationary, rock heterogeneity patterns that control connectivity, such as shale layers that serve as flow baffles and barriers.

Show more

Request a visit from Tao Sun!

American Association of Petroleum Geologists (AAPG)

See Also ...

Ticks and clicks 638050289608650175